Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e518d717b1b3df0…

MALICIOUS

PDF

76.5 KB Created: 2021-06-09 23:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d4f12458e9dd64832dcabec76827b6c7 SHA-1: 5ff5abf9876b9345ada7e650d24d38a2f2804baa SHA-256: 5e518d717b1b3df03a311d21a9080c399c1351cab8e4b31ee440c8031257d018
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://infrive.ru/uplcv?utm_term=latest+telugu+bgm+ringtones PDF link annotation
    • http://fairway.cc/images/blog//file/wadaluvudob.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/lovuxipaxuxenifi.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/d780a3a1e73efd6fc966357bf181b089/sopew.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/13199259739.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/7907abb59eb477e3e145e9f78f19827f/digumuwetab.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/37a0164f2d068c7f482f62f4e18fc691/zelusogadavaxelari.pdfIn PDF document text
    • http://allasclub.com/campannas/file/89141095758.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b25cd9c7865---54977570005.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8efa359d8---89730820623.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/bodufakoxuxebusumodo.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a32de01317---66264311085.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/46319dd2fb89ca75f676b7c94162786b/68388871412.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/e12996999564a53aa85f02c22523a21a/69945704663.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/237bf47bb2aa14f019b79730481f1e23/2307011303.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/dd263f217118ff6d83bc5b0831f78a08/deveb.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/92a49a9bc9faddc28237c7075dcf52b3/15039068574.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/keviraxupuleve.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084d0474c64c---dujepazijojapebezewi.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/86902969937.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 5084 bytes
SHA-256: 742d6548b85c8ea590da82c15c80bf373f205f6d1abb3460f9c2e3e9954abbaa
font_01_sfnt_off000101a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A3 10304 bytes
SHA-256: 71bd02dd657b5483e24a7b7e9365bd090abd81b3b213a2c5ee7e0565c8a75916

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